diff --git a/.gitignore b/.gitignore
index abb89c0..f535e6a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-cmake-build-debug/*
+cmake-build-debug-avr/*
 .idea/*
 main.bin
 main.hex
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..5dd0ea8
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.21)
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_C_STANDARD 99)
+project(vfdprog C)
+
+set(CMAKE_C_COMPILER avr-gcc)
+set(OBJCOPY avr-objcopy)
+set(TARGET_CPU atmega88)
+
+add_compile_definitions("__AVR_${TARGET_CPU}__" "F_CPU=8000000UL")
+include_directories(/usr/lib/avr/include)
+set(CMAKE_C_FLAGS "-Os -mcall-prologues -mmcu=${TARGET_CPU} -Wall")
+
+add_link_options(-Wl,--print-memory-usage)
+add_executable(${PROJECT_NAME}.bin main.c PT6302.c PT6302.h)
+
+add_custom_target(
+        FLASH
+        ${OBJCOPY} -j .text -j .data -O ihex ${PROJECT_BINARY_DIR}/${PROJECT_NAME}.bin ${PROJECT_BINARY_DIR}/${PROJECT_NAME}.hex &&
+        avrdude -p ${TARGET_CPU} -c USBasp -v -U flash:w:${PROJECT_BINARY_DIR}/${PROJECT_NAME}.hex:a
+        DEPENDS ${PROJECT_NAME}.bin
+        COMMENT "Flash to ${TARGET_CPU}"
+)
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 09d561b..7da58e6 100644
--- a/Makefile
+++ b/Makefile
@@ -6,11 +6,11 @@ OBJCOPY=avr-objcopy
 CFLAGS=-std=c99 -Wall -g -Os -mcall-prologues -mmcu=${MCU} -DF_CPU=${F_CPU} -I/usr/lib/avr/include/
 TARGET=main
 SRCS=main.c PT6302.c PT6302.h
-	
+
 all:
 	${CC} ${CFLAGS} -o ${TARGET}.bin ${SRCS}
-	${OBJCOPY} -j .text -j .data -O ihex ${TARGET}.bin ${TARGET}.hex	
-	
+	${OBJCOPY} -j .text -j .data -O ihex ${TARGET}.bin ${TARGET}.hex
+
 flash:
 	avrdude -p ${MCU} -c usbasp -U flash:w:${TARGET}.hex:i -F -P usb
 
diff --git a/PT6302.c b/PT6302.c
index f0db39f..527d5cc 100644
--- a/PT6302.c
+++ b/PT6302.c
@@ -17,7 +17,6 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  * USA
  */
-#define F_CPU 8000000UL
 #include <avr/io.h>
 #include <util/delay.h>
 #include "PT6302.h"